Short answerBecause they were never the right fit, or nobody fed them after they signed: only 7.6% of affiliates send a referral and 1.28% generate a sale.
In detail
Partners sell when they get a reason each month: a campaign to forward, a list of their clients to pitch, a nudge when they go quiet.
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Source: Rewardful, State of SaaS Affiliate Programs, 2026